Higgs Phenomenology in the Two-Singlet Model

Abstract

We study the phenomenology of the Standard Model (SM) Higgs sector extended by two singlet scalars. The model predicts two CP-even scalars $h_{1,2}$ which are a mixture of doublet and singlet components as well as a pure singlet scalar $S_0$ which is a dark matter candidate. We show that the model can satisfy the relic density and direct detection constraints as well as all the recent ATLAS and CMS measurements. We also discuss the effect of the extra Higgs bosons on the different Higgs triple couplings $h_i{h}_j{h}_k$, $i,j,k=1,2$. A particular attention is given to the triple self-coupling of the SM-like Higgs where we found that the one loop corrections can reach $150\%$ is some cases. We also discuss some production mechanisms for $h_1$ and $h_2$ at the LHC as well as at the future International Linear Collider. It is found that the production cross section of a pair of SM-like Higgs bosons could be much larger than the corresponding one in the SM and would reveal physics beyond the SM if observable. We also show that in this model the branching ratio of the SM-like Higgs decaying to two singlet scalars could be of the order of $20\%$, therefore the production of the SM Higgs followed by its decay to a pair of singlets would be an important source of production of singlet scalars.

27 pages, 8 figures, 2 tables, published version

References in corpus (11)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• First results from the LUX dark matter experiment at the Sanford Underground Research Facility
• Results from a Search for Light-Mass Dark Matter with a P-type Point Contact Germanium Detector
• First Dark Matter Results from the XENON100 Experiment
• Study of the mass and spin-parity of the Higgs boson candidate via its decays to Z boson pairs
• New Physics in LHC Higgs boson pair production
• Higgs boson pair production in new physics models at hadron, lepton, and photon colliders
• A Two-Singlet Model for Light Cold Dark Matter
• Partially (in)visible Higgs decays at the LHC
• Production of Light Higgs Pairs in 2-Higgs Doublet Models via the Higgs-strahlung Process at the LHC

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